Method for preparing profile control agent and blocking water agent by employing oilfield waste polymers

Abstract

The invention relates to a method for utilizing waste polymers in the oilfield to prepare a profile control and water plugging agent. The acrylamide and the sodium acrylate monomers are added into the waste polymer gel produced in the oilfield development to carry out the copolymerization and crosslinking so as to synthesize a bulk expansive profile adjusting agent for oilfield which is used for adjusting the large pore reservoir deep profile in the oilfield development. The obtained profile control and water plugging agent for oilfield is applied in the high water bearing region and is a bulk expansive profile adjusting agent for oilfield.

Description

technical field

[0001] The invention relates to a method for preparing a profile control and water shutoff agent by utilizing waste polymers in oil fields, and belongs to the technical field of polymer material preparation. Background technique

[0002] Oilfield waste gel is a waste polymer gel produced after treatment in oilfield production. The main component of the gel is slightly cross-linked or partially cross-linked polyacrylamide gel. Containing a certain amount of crude oil, metal ions and some minerals, it is generally disposed of through landfill and other methods, which not only pollutes the environment greatly, but also wastes resources. How to make waste harmless and comprehensively utilize resources, not only protect the environment, but also increase the reuse of waste, has attracted more and more attention.

[0003] Chinese patent CN1781860 "A Synthetic Method for Preparing Body-Swelling Granular Profile Control Agent Using Oil Production Sludge" prepares a ...